These three-layer face masks feature one side that is 100% polyester that have the Mathnasium logo on a black background. This face mask includes two ear piece slides to adjust to a smaller size. These are without a filter and do not have a slit for a filter. These masks are machine washable on cold. Hang dry or tumble on low heat. DISCLAIMER: Face masks are for general use while out in public and are not intended for a medical setting. We cannot guarantee that the mask prevents infection or the transmission of viruses.